1. Prevention method
The overlapping phenomenon of the era of sputum and phlegm is more serious. When it is controlled, it should be adapted to local conditions, and comprehensive measures such as agricultural control, biological control and chemical control should be used. When implementing agricultural control measures, attention should be paid to the combination of biological characteristics such as spawning and emergence of the stems and sorghum, which can achieve an ideal control effect. Such as: diurnal crouching night, strong phototaxis, especially for black light, strong in production, can be light-trapped and insecticidal on production; Dihua Xixi chooses to lay eggs on rice plants with thick green leaves, thick and tall, producing The field water level can be appropriately lowered before the aphid's spawning peak, and then the water level can be raised to drown those eggs with low position. The location of the phlegm and phlegm and phlegm is related to the water level of the paddy field. Therefore, this habit can be fully utilized in production, and flooding can cause a large number of deaths.
2. Features medication
Rice seedling, tillering sheath blight check, whether the number of dead heart to meet the local group control index (block 100 eggs per acre or per acre with a sheath blight, dead heart group 30, sheath blight or burst rate of 10%), for pick governance dead heart or group control of the whole field; rice at encountered egg masses hatch peaks are to pesticide control in the heading. Chilo big impact on hybrid rice, indicators should be strict.
Prevention of sheath blight, dead heart, peak 3 days before and after the eggs hatch administration, large year occur in eggs hatch 2-3 days before the peak or peak egg hatching upon administration and are spaced about 7 days 2nd administered drug; pest control wounds The plant and white ear are used for the peak period of egg hatching and the peak of egg hatching. If the year of occurrence is large, it is applied twice in 5-7 days.
20% insecticidal double water agent 150-200 grams per acre sprayed or poured with water, can also be mixed with soil; 5% insecticidal double granules 1000 grams per mu; 20% triazophos EC per acre 100 -150 ml, spray with water; 50% chlorpyrifos EC 50-100 ml per acre, spray with water. Trichlorfon treats rice leaf roller, rice planthopper and rice leaf mites, and triazophos also treats rice blast and rice leaf mites. Insecticides, insecticides, and cockroaches are used in the silkworm area. Avoid contamination of mulberry leaves and silkworm houses. Stop using them during sericulture and switch to granules or large granules of insecticides. Jinruite is highly toxic to aquatic organisms such as shrimps and crabs, and cannot be used in rice fields near shrimp, crab, fish and other farms.
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